悬挂式单轨车辆走行轮失效对曲线通过及运行平稳性影响的仿真分析

悬挂式单轨车辆走行轮在车辆运行中起到承载和传力的重要作用,其走行轮失效对悬挂式单轨车辆运行性能有重大影响。通过多刚体动力学理论建立悬挂式单轨车轨耦合动力学模型,仿真分析了不同工况下走行轮失效对单轨车辆曲线通过及运行平稳性的影响。仿真结果表明:空载状态下走行轮失效的悬挂式单轨车辆在曲线半径100 m的线路上限速为35 km/h,而满载状态下走行轮失效的车辆一直处于不安全状态,需要尽快行驶到就近站点疏散乘客;同侧走行轮失效对单轨车辆的影响趋势基本一致;在相同行车速度下,走行轮失效时竖向平稳性指标出现了部分数值超过3.0的情况,说明走行轮失效时车辆的运行平稳性会变差。仿真研究结果可为走行轮失效的悬挂式单轨车辆运行提供参考。

Simulation Analysis of Influence of Running Wheel Failure on Curve Passage and Running Stability of Suspended Monorail Vehicles

The suspended monorail vehicle running wheel plays an important role in carrying and transmitting force during vehicle operation.The running wheel failure has a significant impact on the running performance of the suspended monorail vehicle.The suspended monorail rail coupling dynamics model is established by multi-rigid dynamics theory,and the influence of running wheel failure on the curve passage and running stability of monorail vehicles under different working conditions is simulated and analyzed.The simulation results show that the speed limit of the suspended monorail vehicle with running wheel failure under no-load condition is 35 km/h on the curvewith a radius of 100 m,and the vehicle with running wheel failure under full load condition is always in unsafe state,necessary to be driven to the nearest station as soon as possible to evacuate passengers;the influence of running wheel failure on the same side of the monorail vehicle is basically the same;at the same driving speed,the vertical stability index shows a partial value exceeding 3.0 when the running wheel failure occurs,demonstrating that the running stability of the vehicle worsens when the running wheel fails.The simulation research results can provide reference for the operation of suspended monorail vehicles with running wheel failure.